Device for testing the weight of projectiles and like bodies.



A. RAP?. DEVICE FOB TESTING THE WEIGHT 0F PROJEGTILES AND LIKE BODIES.

APPLICATION FILED JULY 30, 1907 Patented Apr. 27, 1909.

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ALFRED RAPP, OF KARLSRUHE, GERMANY, ASSIGNOR TO DEUTSCHE WAFFEN-UND MUNI- TIONSFABRIKEN, OF KARLSRUHE, GERMANY.

DEVICE Fon TESTING TIIEVWEIGIII To all whom it mcylconcera v i Be it known that I, ALFRED RAPP, a subof the German Emperor, and residing at Lenzstrasse 6, Karlsruhe, Germany,.haveinvented a certain new `and useful Improved Device for Testing the leight of AProjectiles and Like Bodies, specil'ication.

The present invention relates to an im proved devlce for testing the weightsy of pr'o.

jectiles and similar bodies.

i In the testing of projectiles and like bodies by means of weighing machines operating automatically which was customary hitherto, those bodies which were too heavy, too-light and of correct weight were tested by one single balance-beam which was placed in three different positions into which it could be turned by and diminishes the productive capacity. f

Further, in the kind of machines usual for executing this method, there are the further defects that the balance-beam must keep moving, whereby lateral displacements and shocks of the same are produced which give further occasion for stoppages and inaccura--v cies. Lastly, it is difficult to yhold the balance-beam perfectly firm in its position of rest when the projectiles are being removed, as every beam has a different period of Voscillation corresponding weights placed on it. i.

In a device constructed in accordance with the present invention, the system of weighing the projectiles with the aid of one single balance-beam used hitherto is entirely done away with, the weight of the projectile being tested at two stations successively. The

Specification of Letters Patent. Application inea Jury so, 1907. serial NQ. 386,265.

of whichthe following is a means of suitable devices. One or more such balance beams swung past. three stops arranged at three diiferentheights' to the three diiferent weights,- said stops removing the projectiles from thef is considerably into the di'ierence of the 0F RoJof-IILES 'AND LIKE BODIES.

Patented April 27, 1909.

projectile which is brought to the iirst station comes onto a first balance-beam, which is at first held perfectly rigid, where it is subjected to the test of its greatest weight. VIf the projectile exceeds the greatest permissible limit, the balance-beam sinks, after it is f released from its detent, and throws the projectile into the waste conduit situated under it through which it is conducted to a collector. When the weight of the projectile is less than the greatest weight permissible, however, the

projectile is carried further to the second station and on to a second balance-beam, from which it is thrown,if it has the correct weight, and passes through a second conduit intoa second collector; A projectile which is too light, on the contrary, passes this second station also, and is conducted away behind the same through a third conduit into third collector. As compared with the earliermethod, this method has, on the one hand, the advantage of f ar greater accuracy in weighing, and therefore enables very much smaller allowances of weight to be observed, on the -other hand, with suitably formed mechanical means, it permits of a considerlably greater performance or capacity being obtained.

y In o'rder that the invention may be clearly understood reference is made to the accompanying drawing in which one form of the dervice is represented by way of example, and in which:

Figure l is a vertical section through the same. Fig. 2 is a sectional plan on the dotted line in Fig. 1. Fig. 3 is a detail plan yview with parts in section of the mechanism for locking and releasing the rotary table and Fig-4 is an enlarged detail view illustrating the support for the supply pipes.

Similar reference characters refer to similar parts in both views.

Referring to the drawing, a shaft x (Fig. 1) mounted on the frame of the machine is rotated by means of toothed wheel gearing from a source of power. On this shaft x there is a box k which moves a toothed-wheel b. intermittently by means of a pin z, the wheel b being attached tothe turn-table or traveling plate c. Between the toothedcatch m engages every ltime the toothed wheel withthe traveling plate hascompleted one movement. The catch m is sent into the wheel b and the traveling plate cthere is another toothed-wheel Z with which a detent or corresponding gap between the teeth of the wheel Z by means of a spring and it is withdrawn by a lifter, which is formed on the collar y ot' the shaft andwhich rotates the lever w and moves the catch m.

The traveling plate c is provided with slotshaped holes or incisions d for the reception and conveyance of the projectiles. In the circular frame around this plate there are bal ance-beams e and e1 arranged in pairs at equal distances, on the rear ends of which the balance-weights are arranged. When theV projectiles do not rest upon the ends of the balance beams c or e, they are supported by the 'liange of the frame on which the carrier or traveling plate c runs. T he projectiles which are supplied by means of the supply pipes f, 1, f2, f3, and f4 are received by the slots d, so that when the plate c is rotated each projectile is conveyed successivelyT to the balance-beams e and e of the saine pair. ,Preferably the operation would be so conducted as to supply a projectile simultaneously to each of the beams e, of which l have shown four, in the particular construction illustrated by the drawing. While the projectiles are being supplied all the balancebeams are held tast by a clamping device. The box 7c has a slanting groove rl on its periphery, in which the pulley of a two-armed lever i runs and moves a rod il which is in the hollow shaft o'l the traveling plate. The hollow shaft of the traveling plate is slotted below the plate, and a pin u secured to the rod il engages the hub s of arms t which reciprocate a ring g carrying a stop g1 for each balance-beam (Fig. l). These stops are placed against the scale-end of each of the balancebeams so that during the supply or the projectiles all the balance-beams are simultane ously held stationary. Then the projectiles are at rest, the ring g with its stops g1 goes downward, and the balance-beams e, c1 are released so that they can swing.

lf the projectile which is placed on the balance-beam e is too heavy it falls down here and passes through the conduit 7L into a collector. li' on the contrary the projectile is less than the greatest permissible weight, it is conveyed by the disk c, after the balancebeams have been arrested by the device g, in order to be subjected to another test as to its weight on the second balance-beam el. li the projectile has the correct weight, the balance-beam el turns and throws it through the conduit h (Fig. 2) into a second collector. It, on the contrary the weight of the projectile is less than the correct weight, it is conveyed farther by the disk c and falls behind the balance-beam el through the conduit 7L"5 into a third receptacle. In this manner the projectiles are separated according to three classes of weight those of' each class going into a special receptacle for the same. As

already mentioned, during the conveyance and placing oi" the projectiles on the balance beams, the latter are held tast by the device g which contributes substantially to the acenracy et the weighing.

Vilhat l claim as my invention and desire to secure by Letters Patent is l. ln an automatic weighing device, the combination of a lrame, a shait thereon, a circular traveling plate having holes and revoluble on said frame, a toothed wheel coax ially attached to said plate, a. driving memberon said shalt adapted to drive said wheel once for each revolution of said shaft, a sj-)ring-pressed detent on said trame normally` engaging said. wheel, another driving member on said shal't for withdrawing said detent from said wheel once lor each revolution ol' said shaft, with a plurality ol' balanee-beanis arranged in pairs on said lranie around said plate and having the scale-ends et said beams under the path of' said holes.

2. ln an automatic weighing device, the combination of a frame, a shalt thereon, a circular traveling plate having holes and revoluble on said frame, a toothed wheel coaxially attached to said plate, a boxY on said shaft, a pin en said box adapted to drive said wheel once lor each 'rrwolution of said shalt, detent means on said frame normally engag ing said wheel, means actuated by said shaft for withdrawing said detent means from said wheel once lor each revolution of said shalt, with a plurality ol balance-beams arranged in pairs on said frame around said plate and having the scale-ends of said beams under the path of said holes.

3. ln an automatic weighing device, the combination ol a frame, adriving shatt thereon, a box having a groove on its periphery on said sh al't, a hollow sh att having an opening on said trame, a turn-table having holes and revoluble on said hollow sh alt, a toothed wheel attached coaxially to said turn-table, a plurality of balance-beams arranged in pairs on said trame around said plate and having the scale-ends of said beams under said holes. a lever revoluble on said frame, one end ol said lever being guided in said groove, the other end oi. said lever passing through said opening into said holleiIv shaft, a rod in the latter attached by one end to said lever, a ring having arms attached to the other end of said rod, and a plurality oll stops on. said ring under said balance-beams, whereby when said former shaft is rotated, said lever' is oseillated and said stops hold and. release said balance-beams.

ln testimony whereof, lY al lix my signature in the presence of two witnesses.

Witnesses 1 Sori-nn RAM), Jos. H. LEUTE. 

